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Finding the Fourth Proportional to 169,398.98, 254,112.29 and 85,115.64

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Solution

The fourth proportional to 169,398.98, 254,112.29 and 85,115.64 is: 127,680.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,398.98 : 254,112.29 = 85,115.64 : x
  2. Step 2: Convert to fraction form
    169,398.98/254,112.29 = 85,115.64/x
  3. Step 3: Cross multiply
    169,398.98x = 254,112.29 × 85,115.64
  4. Step 4: Simplify right side
    169,398.98x = 21,628,931,041.74
  5. Step 5: Solve for x
    x = 21,628,931,041.74/169,398.98
  6. Step 6: Final answer
    x = 127,680.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.